src/main/drivers/inverter.c

   1 /*
   2  * This file is part of Cleanflight and Betaflight.
   3  *
   4  * Cleanflight and Betaflight are free software. You can redistribute
   5  * this software and/or modify this software under the terms of the
   6  * GNU General Public License as published by the Free Software
   7  * Foundation, either version 3 of the License, or (at your option)
   8  * any later version.
   9  *
  10  * Cleanflight and Betaflight are distributed in the hope that they
  11  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  12  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  13  * See the GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this software.
  17  *
  18  * If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include <stdbool.h>
  22 #include <stdint.h>
  23
  24 #include "platform.h"
  25
  26 #ifdef USE_INVERTER
  27
  28 #include "io/serial.h"
  29 #include "drivers/io.h"
  30 #include "drivers/serial.h"
  31 #include "drivers/serial_impl.h"
  32
  33 #include "inverter.h"
  34
  35 static const serialPinConfig_t *pSerialPinConfig;
  36
  37 static IO_t findInverterPin(serialPortIdentifier_e identifier)
  38 {
  39     const int resourceIndex = serialResourceIndex(identifier);
  40     if (resourceIndex >= 0 && resourceIndex < (int)ARRAYLEN(pSerialPinConfig->ioTagInverter)) {
  41         return IOGetByTag(pSerialPinConfig->ioTagInverter[resourceIndex]);
  42     } else {
  43         return NULL;
  44     }
  45 }
  46
  47 static void inverterSet(IO_t pin,  bool on)
  48 {
  49     IOWrite(pin, on);
  50 }
  51
  52 static void initInverter(serialPortIdentifier_e identifier)
  53 {
  54     IO_t pin = findInverterPin(identifier);
  55     if (pin) {
  56         const int ownerIndex = serialOwnerIndex(identifier);
  57         // only UART supports inverter, so OWNER_INVERTER+ownerIndex does work
  58         IOInit(pin, OWNER_INVERTER, ownerIndex);
  59         IOConfigGPIO(pin, IOCFG_OUT_PP);
  60         inverterSet(pin, false);
  61     }
  62 }
  63
  64 void initInverters(const serialPinConfig_t *serialPinConfigToUse)
  65 {
  66     pSerialPinConfig = serialPinConfigToUse;
  67
  68     for (unsigned i = 0; i < ARRAYLEN(serialPortIdentifiers); i++) {
  69         // it is safe to pass port without inverter
  70         initInverter(serialPortIdentifiers[i]);
  71     }
  72 }
  73
  74 void enableInverter(serialPortIdentifier_e identifier, bool on)
  75 {
  76     const IO_t pin = findInverterPin(identifier);
  77     if (pin) {
  78         inverterSet(pin, on);
  79     }
  80 }
  81
  82 #endif // USE_INVERTER